New %26quot;on-off%26quot; optical probe based on Schiff base responding to Al3+ ions: Logic gate application

作者：Gupta Vinod Kumar; Jain Ajay Kumar; Shoora Sudhir Kumar

来源：Sensors and Actuators B: Chemical , 2015, 219: 218-231.

DOI：10.1016/j.snb.2015.05.026

• Schiff base
• Receptor
• Spectrofluorophotometry
• Stability constant
• Logic gate

Two extremely sensitive spectrophotometric receptors namely as N,N'-bis(o-hydroxyacetophenone)-m-phenylenediamine (P) and N-(o-hydroxyacetophenone)-o-phenylenediamine (Q), based on imine-hydroxy moieties as a binding and signalling unit, have been synthesized and characterized by means of various spectroscopic techniques. The receptors show an instantaneous response towards Al3+ ions through selective fluorescent enhancement, attributed to chelation enhanced fluorescence effects. The spectrophotometric behavior of the receptors in the presence of Al3+ ions was significantly compared with those of other metal cations tested. The synthesized receptors worked effectively in the physiological pH range. Further, the integrated logic gate nature based on Al3+ and EDTA titration, through the emission mode has also been described. Thus, these receptors offer a novel turn-on fluorescent approach for the selective detection of Al3+ ions qualitative as well as quantitative in biological and environmental samples.

• 出版日期2015-11
• 单位中国石油大学（北京）